Mustard production projected by Statistics Canada shows a decline of almost 50 percent from a year ago. Mustard is grown mainly in southern Saskatchewan and southern Alberta, two areas hit hardest by drought. That accounts for most of the steep production decline. A smaller crop this year and low carryover stocks could send mustard prices up. Canadian mustard production is estimated to come in at 129,500 tonnes, down from 235,600 tonnes a year ago, which is a decline of 45 percent year-to-year.